Keystones — Lintel
Five GCSE retrieval questions · 31 March 2020 · mathsvault.uk/keystones
-
1. Number Converting to standard form
0.00047
Answer: 4.7 × 10-4 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 2
Answer: (x + 2)(x - 1) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 15cm, angle = 45°. Find adjacent side
Answer: 10.6cm -
4. Ratio Mixed ratio problems
Simplify: 4:4:10
Answer: 2:2:5 -
5. Statistics Mean
The mean of 4 numbers is 23. If 3 of them are 25, 26, 18, what is the missing number?
Answer: 23